At the time of writing this post I have just finished browser testing the new site (I wrote it a while back) and it went rather smoothly. The reason for this is because I now use the rule:
If I can’t see it, I don’t care
In the past I would spend hours over the smallest details when it came to browser testing, ensuring a site was identical to the original design. Of course this was a little crazy, so now I get a site built and working in Firefox and then browser test to remove an obvious or critical functionality or positioning problems. The reason for the careless approach is that many users will not notice the small differences or notice that anything is broken as they probably don’t compare sites in various browsers like Web Developers.